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Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Statement of Comprehensive Income [Abstract] |  |  |
Net loss attributable to common stockholders | $ (12,047) | $ (5,812) | $ (3,870)
Other comprehensive income (loss), net: |  |  |
Unrealized gain (loss) on investments, net | 9 | (98) | (103)
Reclassification of net realized investment gains included in net loss | 38 | 164 | 1
Foreign currency translation adjustment | 653 | 77 | (373)
Total other comprehensive income (loss), net | 700 | 143 | (475)
Comprehensive loss | $ (11,347) | $ (5,669) | $ (4,345)

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